Home / 12,705.60-19,050.40-5,315.20

Finding the Fourth Proportional to 12,705.60, 19,050.40 and 5,315.20

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Solution

The fourth proportional to 12,705.60, 19,050.40 and 5,315.20 is: 7,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,705.60 : 19,050.40 = 5,315.20 : x
  2. Step 2: Convert to fraction form
    12,705.60/19,050.40 = 5,315.20/x
  3. Step 3: Cross multiply
    12,705.60x = 19,050.40 × 5,315.20
  4. Step 4: Simplify right side
    12,705.60x = 101,256,686.08
  5. Step 5: Solve for x
    x = 101,256,686.08/12,705.60
  6. Step 6: Final answer
    x = 7,969.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.